Preformed end wire for card and like rolls



Dec. 17, 1957 J. D. HOLLINGSWORTH 2,316,325

PREFORMED END WIRE FOR CARD AND LIKE ROLLS FIGS.

ept 2'7, 1955 2.

I INVENTOFU JOHN D. HOLLINGSWORTH fiazmtm/di f/WW R a) b ATTYS.

2,816,325 Patented Dec. 17, 1957 ice PREFORMED END WIRE FOR CARD AND LIKE ROLLS John D. Hollingsworth, Greenville, S. C.

Application September 27, 1955, Serial No. 536,933

2 Claims. (Cl. 19-112) My invention pertains to improvements in carding and allied apparatus and more particularly in card or equivalent rolls which require build-up in diameter to adapt them for use with metallic card clothing.

A principal object of the invention is to facilitate, simplify, and reduce the expense of converting a roll or cylinder originally designed for flexible (or fillet) card clothing for reception of metallic clothing.

To this primary end, the invention contemplates also the provision as a new article of manufacture of a novel preformed element of structure the use of which, as hereinafter described, affords the aforesaid advantages.

The invention may be more readily understood by reference to the attached drawings, wherein:

Fig. l is a fragmentary side elevational view showing one end of a card roll in an intermedaite state of conversion employing the device of the invention;

Fig. 2 is an enlarged fragmentary sectional view of the roll showing details of structure involved in the invention;

Fig. 3 is a view in perspective of an element of the structure shown in the preceding figures, and

Fig. 4 is a view in perspective of an end wire for a card or other roll preformed in accordance with the invention and shaped to the annular form for ready application to the roll.

With reference to the drawings, 1 indicates a cylinder or roll body which may be conventional in form and to which it is desired to apply metallic card clothing. To that end the roll is provided at each end, see Fig. 2, with a circumferential groove 2 which receives the longitudinal flange 3 of an end wire 4 having in its outer face, which lies opposite the flange 3, a longitudinal groove 5. It is with the end wire 4 that the present invention is primarily concerned.

As shown in Fig. 2, the end Wire 4 forms an abutment for a build-up wire 6 which is wound on the roll in contiguous helical convolutions to form a solid base for the metallic card clothing '7 which, in turn is wound in like contiguous helical convolutions on the said base. To provide an abutment for and to axially confine the terminal convolutions of the clothing wire 7, strip material is inserted and secured in the groove to form an abutment ring 8 in accordance with prior practice.

Prior to my invention it was customary in building up the roll as described above, to insert blank end wires in the grooves 2, i. e., wires lacking the longitudinal grooves 5 which receive the rings 8, and to produce these grooves 5 after the end wires have been installed. This operation, involving manipulation of the entire roll, was difficult, time consuming, and correspondingly costly. I have found it entirely practical to preform the wire material from which the end wires 4 are produced to the final form of the end wire including the groove 5 and have thereby achieved material advantages in reduced time and increased economy in production. As a new article of manufacture, the grooved preformed end wire greatly facilitates the roll build-up operation and constitutes an improvement of substantial importance to the trade.

I have found that the preformed wire may be made by several methods. A straight wire having the flange 3 may be clamped over its entire length on the table of a planer, for example, and the longitudinal groove then formed wtih a suitably mounted milling cutter. For a 50" diameter card cylinder, the strip would be approximately 14 ft. in length. Instead of a revolving milling cutter, I have found it practicable to use a single point cutting tool, cutting the groove in increments in successive strokes of the table or tool as the case may be. In greater lengths, I have produced the groove by winding the blank wire on a cylinder in helical convolutions and by then traversing a milling cutter or a cutting tool axially of the cylinder simultaneously with the rotation of the latter in a manner corresponding to lathe operation. By using a suitable soft material for the wire, the final form has been achieved by extrusion through forming dies. I have also produced the groove in a wire blank by a rolling operation.

Irrespective of the manner in which the preformed wire may be produced, I have found it of advantage to shape the wire in a length suitable for the particular roll size in the form of a split annulus which when applied to the roll will seat, preferably with substantially accuracy in the receiving groove 2. Preferably the adjoining ends of the annulus are bevelled as shown at 9 in Fig. 1 so that the joint is inclined to the direction of rotation of the roll. When thus accurately seated it is only necessary to secure the wire by soldering, brazing, welding or otherwise joining the said ends. This avoids necessity for working the wire on the roll to the required fit and effects a material conservation of the assembly time.

I claim:

1. As a new article of manufacture for assembly with card rolls and the like to provide end wires for confinement of convolutions of build-up wire wound on the periphery of the roll and to receive and retain abutment rings for metallic card clothing applied to the said convolutions of build-up wire, a preformed wire of generally h-shaped cross section having a continuous longitudinal rectangular flange at one side forming the upstanding projection of the h and a continuous longitudinal rectangular groove in the side opposite said flange and forming the legs of the h.

2. A preformed end wire according to claim 1 in the form of a split annulus.

References Cited in the file of this patent UNITED STATES PATENTS 1,856,279 Hellman May 3, 1932 2,372,979 Phillips Apr. 3, 1945 2,633,073 Bieber et a1. Dec. 22, 1953 FOREIGN PATENTS 1,047,057 France Dec. 10, 1953 

